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replacekey

NAME

replacekey − replace keywords in a FITS header

SYNOPSIS

replacekey [options] <in>

DESCRIPTION

replacekey is aimed at replacing keywords in a FITS file’s header by new keywords provided by the user on the command-line.

ALGORITHM

The user can provide a new_keyword, an old_keyword, a value and a comment. first searchs for old_keyword if provided. If it finds it, it replaces the associated card by the new one (new_keyword=value/comment). If old_keyword is either not found or not provided, associated card by the new one (new_keyword=value/comment). new_keyword has to be provided.

Examples: You want to change the value of VALUE from 32 to 16 in myfile.fits: % replacekey -k "VALUE" -v "16" myfile.fits

If you want to replace the card with the keyword OLD by "NEW = 3.14 / This is a usefull key" in myfile.fits: % replacekey -k "NEW" -v "3.14" -c "This is a usefull key" -K "OLD" myfile.fits

If your do not care about the HISTORY cards you have in the header, and want to replace the first one by VALUE=32, you would do:
% replacekey -k "VALUE" -v "32" -K "HISTORY" myfile.fits

OPTIONS

−k or −-key key

To provide the new keyword.

−K or −-old key

To provide the old keyword.

−v or −-val val

To provide the new value.

−c or −-com com

To provide the new comment.

SEE ALSO

hierarch28 to convert HIERARCH ESO keywords to regular 8-char keywords.

FILES

Files shall all comply with FITS format

BUGS

Modifications are so far only possible in the main header, not in the extensions.

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